A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5990-00-565-6118
NSN 5965-01-085-4299
NSN 6240-00-832-6867
NSN 5915-00-576-6395
NSN 5925-00-550-4946
NSN 5910-01-059-3595
NSN 6150-00-554-7591
NSN 6130-01-160-8037
NSN 6320-00-681-1324
NSN 7035-01-551-3258
NSN 6620-01-352-5640
NSN 7035-01-106-3476